Originally Posted by 8ight-e

I do most of my short course racing during the winter on a carpet indoor off-road course (diff w/ 3k fluid and stock tires w/ some grip compound). For summer last year (some this year) I was on a pretty loomy course made specific for short course racing, but this year I will be doing more racing on a large 1:8 scale course (the RPM upgrades will be nice here) that has pretty good traction normally. The RPM parts are even nice indoors as it gets pretty rough at times with some mains peaking at 8 drivers on a pretty tight course. Get bumped just right and your pushed right off the track or into the walls etc. With the ball diff (I use the MIP) it's ok but no better lap times than I get w/ the stock diff with grease in it for outdoors and for inside I didn't like it at all.

The best thing you can do iMO is stay with a 13.5 motor and don't let ther power get to you.. keeps for great lap times.. I had a 10.5 and actually had lower lap times on ALL of the tracks I run. The 10 would just spin out too easily in corners and even on the straight I often ran into issues getting up to speed.. granted this was pre- caliber tires and most tracks have a 13.5 2s lipo limit anyway.. so it's a pretty sound choice.